Carburetor



ept. 30 1924.

F. BAVEREY CARBURETOR Filed Sent. 24. 1920 3 Sheets-Sheet l apt.30.1924. smzw F BAVEREY CARBURETOR Filed Sept. 24. 1920 3 Sheets-Sheet 2ept. 30 1924.

F. BAVEREY CARBURETOH LSEQZQB Filed Sept. 24. 1920 3 Sheets-Sheet 5esteem se t; a, rare.

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;r are FRANQDIS BA'VEREY, OF LYON, FRANCE, ASSIGNOB T SOCIETE DUGABBUMTEUR 2mm, 0! LYON, FRANCE, A CORPORATION OF FMNCE.

GABBURETOR.

Application filled Eeptembcr 2 1, 1920. erial We. emcee.

slow speed running or idling mixture, and

temporary enrichment of such mixture for startmg purposes.

is. to provide an attachment for the atmos- 29 pheric wells ofcarburetors by means of which the idling or slow speed jet 'ied therebymay be caused to simply a combustible mixture having a greater quantityof fuel in proportion to the air, without varying the supply oi": air tothe atmospheric well.

The foregoing and other objects, together with their attendantadvantages, will be apparent as the invention becomes better understood, by reference to the accompanying specification and drawingsforming a part thereof, it beingv premised that changes may be made inthe various details and the manner of operation, within the scope of theappended claims, without departing from the spirit of the invention.

Figure 1 is a diagrammatic view of a construction in accordance with thepresent invention.

Figure 2 is a similar view oi a slightly modified embodiment of myinvention.

Figure 3 is a vertical sectional view through an atmospheric well havingmy improved regulating device applied thereto.

Figure 4 is a side elevation of the construction illustrated in Figure 3removed irolpi the gvell. a F

igure is a view, correspon ing to igure 3, of a slightly modified formof my invention.

Figure 6 is a view, corrmponding Figure g, of the modificationillustrated in Figure Figure 7 is a detail sectional view on an enlargedscale of the adjustin valve, and

Figure 8 is a vertical sectional view through a commercial carburetorconstructed in accordance with my invention.

In my earlier Patent No. 1,186,371, of June 6, 1916, there is disclosedan improvement in adjusting devices for carburetors comprising means forvarying the amount of air to the main well. My present invention hasrelation generally to a construction of this nature but difibringtherefrom in that the supply ofair to the main well is not changed andonly the slow speed mixture made richer to "facilitate starting. Afurther object of the present invention Referring more particularly tothe drawings, there is illustrated a carburetor comprising a constantlevel chamber 1 having a suitable connection to a main feed jet 2terminating adjacent the point of maximum restriction in the venturi 3of the suction pipe l. Surrounding the main jet 2 is a compensating jet5 receiving its supply of fuel from an atmospheric well 6 having an airopening 7 to the atmos here. The suction pipe 4 has the usual a1r inlet8 and is' controlled by a suitable throttle valve 9. 1n

general, the details of construction, as described, are shown in myPatent 1,188,390, of June 27, 1916.

In the embodiment of my invention illustrated in Figure 1, theatmospheric well 6 has extending thereinto a tube 10 having its loweropen end extending into the fuel within the well and its upper andconstructed to form a slow speed nozzle 11. speed nozzle is positionedwithin a chamber 12 into which extends one end of a slow speed emulsionconduit 13, 14 opening through the-wall of the suction tadjacent thethrottle valve 9, an avmg a branch 15 leadin to my im roved regulatingdevice R to e describe in detail hereinafter. The chamber 12 has airopenings '16 formed therein which are made small enough so as not to besuficient to maintain atmospheric pressure in the interior. In

' of my invention the slow speed The slow nozzle is above the fuel levelwithin the at- -mospheric well as disclosed in my Patent -level,-acalibrated openin 17 forming a determined supply for idling or slowspeed running. Within the branch 15 there is a needle valve 18 having aseat l9-formedein the branch 15' of the conduit intermediate its pointof union with the, main conduit and the regulating device R. This needlevalve controls the maximum amount of-air which can pass into the branch14 even though the device R is in wide open position, as will be clearlypointed out hereinafter.

A commercial embodiment of the diagrammatic construction of Figure 1 isillustrated in Figures 3' and 4 in which the tube 10 is screwed into thelower end of the easin 12 carried by a plug 20 screwed into an en argedchamber 21 formed in the upper end of the atmospheric well andcommunicating by the branch conduit 14 with the suction pipe 4. Theportion of the'con- 'duit 13, as disclosed in Figure 1, which extendsinto the casing 12, is in the form of I a tube 22 vertically adjustablewithin the casing 12, and'communicating through openings 23 in saidtube, and openings 23 in the plug 20 with the conduit 14.

The upper end of the chamber 21 is closed by a screw-threaded plug 24having a tubular upwardly projecting portion 25 communicating with theinterior of the chamber 21 through an opening 26. Around the tubularportion 25 is a split bracket 27 clamped in position by a tighteningscrew 28 and held against removal by engaging a shoulder 29 on thetubular portion 25.

Slidably mounted within the tubular portion 25 is a needle valve 30adapted to control the opening 26 to the chamber 21. Surrounding theneedle valve 30 is a compress1 on spring 31 partially enclosed by ahollow head 32 secured to the needle valve and provided with openings 33to the atmosphere. For moving the 'needle valve 30 against the action ofthe spring 31 to close V 1 the opening 26, there is provided a cam 34mounted on the shaft 35 in the bracket 27 and adapted to be operated bya lever 36. The open position of the needle valve 30 1s controlle by anadjustable stop screw 37 adapted to engage a stop 38 formed by thebracket 27 and thereby regulate the maxi- In adjusting the carburetorfor use, the

stop screw 37 is moved until the proper amount of air is permitted topass through the opening 26 to produce an accurately proportionedvmixture for idling or slow running speeds when themotor has reached itsnormal working temperature. In starting, or when the engine is cold, thesupply of. air through the o ening 26 is entirely out off or partlydimmished to enrich the slow speed mixture to facilitate starting. Thisis accomplished by the action of the cam 34 on the needle valve 30. Itwill be apparent that this is accomplished without eh'an ing the mainair supp y to the atmospheric well 6, so that the ad ustment of thecompensating nozzle is not destroyed 'or altered. I

v In Figures 5., 6 and 8, there is illustrated a commercial embodimentof the diagrammatic construction illustrated in Figure 2, withtheneedle. valve 18 replaced by the stop screw before described, inconnection with Figures 3 and 4. In these figures of the drawings, partscorresponding to parts already described are represented by the samereference characters primed as in Figure 2. As so constructed, theconduit 13' is carried by a plug 24, held in positionby a set screw 40and carrying a regulating de' vice'R', as previouslyidescribed indetail. The plug 24 has an opening 23' formed therein and communicatingwith the conduit 14 leading to thethrottle valve. The operation of thistype of control is the same as that illustrated in Figures 1, 3 and 4 ofthe drawings and need not be described in detail.

The advantages of the resent invention arise from the provision 0 meansfor easily and quickly enriching the slow speed mixture without changingthe air supply to the atmospheric well.

I claim:

1. In a carburetor, a constant level chamber, a suction pipe havingI afuel nozzle therein communicating wit said chamber, a throttle valve insaid pipe, an atmospheric well open to the atmosphere, a conduitextending from the well and opening into the suction pipe adjacent thethrottle and constituting a slow speed feed device, means for feeding anemulsion of fuel and air from the well to the conduit, regmlable meansset in an open position for determining the maximum supply of air to theconduit, and means for temporarily decreasin the supply of air to theconduit without e footing the air supply to the well, substantially asdescribed.

2. In a carburetor, an atmospheric well maoaoe open to the atmosphere,means for feeding the flow of air through said valve controlled W fuelto the well, a slow s feeding deinlet, substantially as described.

vice adapted to receive fuel from the well, In testimony whereof, I havehereunto set a plurality of air inlets for said slow speed my hand.

feeding device, a valve adapted to be adjusted in its open position forregulating the maximum amount of air which can pass through one of saidinlets, and a manually operable means for temporarily changing FRANQOISBAVEREY, Witnesses:

JULIAN KEMBLE Seam, GRADE Sonnrrr.

